vember, 1931 Page 15

BUILDERS of HOOVER, DAM. " '

Select INTERNATIONAL TRUCKS"Six Companies Inc.," Builders of Greatest EngineeringProject Since the Panama Canal, Place Large Order

Exclusively with International Harvester

HOOVER DAM is under way. The greatBoulder Canyon project of the United

States Government which has long made newsfor a nation now advances into constructionstages.And as action begins on the mighty Colorado,

comes a news item of vital interest to the con-struction industry and to the automotive world.Six Companies Inc., of San Francisco, a com-bination of six leading western contractorswhich is to build Hoover Dam under a bid of$48,890,999, has standardized on InternationalTrucks as qualified above all others to bear theheavy hauling responsibilities in their contract.The full meaning of this decision-the ex-

tent of the honor paid to International per-formance and service-can be appreciated onlywhen measured against the immensity of theproject itself.

TheJob-Space does not permit going into the details ofthe Hoover Dam project. They have long bee~matters of public record. Suffice it here to saythat the plan encompas~es :flood control andgeneral river regulation, irrigation, silt con-trol, power development and domestic watersupply affecting a large part of the Southwest.The entire enterprise involves an appropriationof $165,000,000 and includes many auxiliarydevelopments of great magnitude in additionto the dam itself.The dam will fill the gigantic chasm of the

Colorado River to a height of about 730 feetabove the foundations. It will be one-eighth ofa mile thick at the base, will contain about3,400,000 cubic yards of concrete, and will im-pound 30,500,000 acre-feet of water in an areavastly greater than Gatun Lake at the PanamaCanal. Millions of yards of rock and earth musthe removed; millions of tons of buildingmaterial must be hauled. Employment willbe given to thousands of men, the work

One of the International heavy.duty trucksuJorking at Hoover Dam. The open hood isexpressive of the intense heat in the canyon,rising as high as128 degrees. The boulder-proof armored cab is Further evidence ofconditions encountered. Note, at right' ofshovel, the entrance to an auxiliary tunnelused in construction of the great diversiontunnels that will extend three miles throughsolid rock.

extending over a period of six to seven years.Today the canyon hums with intense activity.

"Boulder City" is springing into being like amagic town of gold or oil. Railways and high-ways are being built. Modern engineeringgenius is mobilizing to conquer problems thatstagger the imagination. Already work has be-gun on four great diversion tunnels each 50feet in diameter and nearly a mile long, to bedriven through the solid rock of the canyonwalls. These channels alone involve the haul-ing of nearly a million truck loads.

-and the TrucksIn such a setting, with mountains to be movedunder such conditions, trucks will have theirwork cut out for them. Six Companies Inc.,guided by years of experience in heavy-duty

Front of dam willrise just beyondfoot bridge shownhere. Hoover Damwill be higher thanany dam now ex ..isting and the con..struction will re ..quire 5,500,000barrels of cementand nearly 60,000tons of steel andother metals.

The HooverDam regionon theNevada-Arizonaline.

,NEVADA

Hoover Dam as it will look on completion.towering 730 feet above foundation rocle;with power houses on both banks of theriver. The dam will be nearly 1200 feet long.45 feet thick at the top, and 650 feet thickat the base. This barrier will form a reser-voir 115 miles in length with a shore line of550 miles and an area of 227 square miles.the largest artificial lake in the world.

hauling, is banking on Internationals. Thefine performance ofInternationals in the serviceof the first sub-contractors on work in the canyononly made the choice the easier. Scores of Inter-national Trucks are now in process of deliveryat the site. The first :fleetshave long been on thejob, rugged, capable, and economical-admiredalike by the engineers, the drivers and theshovelmen who know full well how good eachtruck must be to stand the gaff.International Harvester is proud to have

Internationals selected for work on HooverDam. The news from Boulder Canyon is ofgreat practical value to buyers of trucks every-where. It provides another chapter of evidencecontributing to the high reputation of Inter-national Trucks. I

INTERNATIONAL HARVESTER COMPANY606S.MichiganAve. ?~c!%~~.!,<;,~ rhicago, III.